Ukraine is losing the battle on the ground. Many of its soldiers are tired and exhausted after three years of fighting. The question – can the country endure another year of war? Their forces are still resisting Russian advances in the east. But they're almost surrounded near the town of Kurakhove – scene to some of the most intense fighting in recent weeks. The Black Pack, a mortar unit, is trying to prevent their encirclement around Kurakhove. The Russian are closing in on three sides. We meet the team at a safe house, getting a rest from the fighting. They're...